> limited their educational opportunities, and also because it’s hard for a child to lever themselves into a higher socioeconomic group than their parents.

Is this not what universal state-funded schooling is for. (And please don't forget that state-level funding is anti-correlated with local funding, so the standard "but property taxes!" thing is a red herring.)

> Equity vs. equal opportunities; I’m sympathetic to the latter, but what do you do when the opportunities were unequal in the past, and that causes inequitable results in the present?

I am not aware of anti-dei people having problems with need-based (as opposed to demographics-based) scholarships and such.